Water mass and throughflow transport variability in the Taiwan Strait
Water mass and throughflow transport variability in the Taiwan Strait
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DOI：
10.1029/2006jc003656
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发表时间：
2006-12-14
影响因子：
3.6
通讯作者：
Kuo, Huei-Ming
中科院分区：
文献类型：
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作者：
Jan, Sen;Sheu, David D.;Kuo, Huei-Ming
利用1985-2003年台湾海峡全断面导温深资料和1999-2001年断面声学多普勒流速剖面资料，分析了台湾海峡的水团变化和通流输运。聚类分析、温盐图和直接输运计算结果表明，12 ~ 1月，东北季风的强作用使中国近岸混合咸水进入北方海峡，并阻碍黑潮分支盐水向北侵入海峡东南部。在此期间，穿越海峡中部的平均通流输送约为0.1 Sv，从而支持了以前的观测结果，即整个海峡在冬季没有持续的向北流动的电流。然而，东北季候风在2 - 3月减弱，使KBW得以向北侵入东海。在6月，这种北向输送的增加伴随着黑潮通过吕宋海峡向西入侵的减少，导致KBW被盐度较低的南海海水（SCSW）所取代。3 - 8月向北输送的通量为1.16 - 2.34 Sv，向东中国海输送的温盐通量分别为0.131- 0.238 × 10 ~（15）W和53.33- 81.74 × 10 ~（6）kg/s。10月东北季风的建立标志着水团由秋季向冬季型的转变和向北的通流输送的减少。我们的研究结果还表明，地下KBW和SCSW保持一致，在整个观测期间之间的100和200米和低于200米的深度，分别在东南海峡。
Variability of water mass and throughflow transport in the Taiwan Strait are analyzed using strait-wide conductivity-temperature-depth (1985-2003) and sectional acoustic Doppler current profiler (1999-2001) data. Results from a cluster analysis, temperature-salinity diagrams, and direct transport calculations indicate that the strong northeast monsoon drives the brackish Mixed China Coastal Water into the northern strait and hinders the northward intruded saline Kuroshio Branch Water (KBW) in the southeastern strait from December to January. The mean throughflow transport across the central strait is about 0.1 Sv southward during this period, thus supporting previous observations that there is no persistent northward flowing current throughout the strait in winter. The weakening of the northeast monsoon in February-March, however, emancipates the KBW to intrude northward into the East China Sea (ECS). In June, the increase in this northward transport accompanied by the decrease in the westward intrusion of Kuroshio through the Luzon Strait leads to the replacement of the KBW by the less saline South China Sea Water (SCSW). The northward transports ranging from 1.16 to 2.34 Sv between March and August yield 0.131-0.238x10(15) Wand 53.33-81.74x10(6) kg/s of temperature and salt transports, respectively, toward the ECS. The inception of the northeast monsoon in October marks both the change of water mass from fall to winter patterns and the decrease of the northward throughflow transport. Our results also reveal that the subsurface KBW and SCSW remain consistent throughout the observation periods between 100 and 200 m and below 200 m depths, respectively, in the southeastern strait.